Revert of Reland "Keep a canonical list of shared function infos."

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index be38302a57fc7a78ad6036422c6de9a3960111b5..377164e254d9be7cc2f5b1aa7d6a8b73d97f8443 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -10404,55 +10404,6 @@
 }
 
 
-MaybeHandle<SharedFunctionInfo> Script::FindSharedFunctionInfo(
-    FunctionLiteral* fun) {
-  if (shared_function_infos()->IsWeakFixedArray()) {
-    WeakFixedArray* array = WeakFixedArray::cast(shared_function_infos());
-    for (int i = 0; i < array->Length(); i++) {
-      Object* obj = array->Get(i);
-      if (!obj->IsSharedFunctionInfo()) continue;
-      SharedFunctionInfo* shared = SharedFunctionInfo::cast(obj);
-      if (fun->function_token_position() == shared->function_token_position() &&
-          fun->start_position() == shared->start_position()) {
-        return Handle<SharedFunctionInfo>(shared);
-      }
-    }
-  }
-  return MaybeHandle<SharedFunctionInfo>();
-}
-
-
-void SharedFunctionInfo::SetScript(Handle<SharedFunctionInfo> shared,
-                                   Handle<Object> script_object) {
-  if (shared->script() == *script_object) return;
-  // Remove shared function info from old script's list.
-  if (shared->script()->IsScript()) {
-    Script* old_script = Script::cast(shared->script());
-    if (old_script->shared_function_infos()->IsWeakFixedArray()) {
-      WeakFixedArray* list =
-          WeakFixedArray::cast(old_script->shared_function_infos());
-      list->Remove(shared);
-    }
-  }
-  // Add shared function info to new script's list.
-  if (script_object->IsScript()) {
-    Handle<Script> script = Handle<Script>::cast(script_object);
-    Handle<Object> list(script->shared_function_infos(), shared->GetIsolate());
-#ifdef DEBUG
-    bool found = false;
-    list = WeakFixedArray::Add(list, shared, WeakFixedArray::kAddIfNotFound,
-                               &found);
-    CHECK(!found);
-#else
-    list = WeakFixedArray::Add(list, shared, WeakFixedArray::kAlwaysAdd);
-#endif  // DEBUG
-    script->set_shared_function_infos(*list);
-  }
-  // Finally set new script.
-  shared->set_script(*script_object);
-}
-
-
 String* SharedFunctionInfo::DebugName() {
   Object* n = name();
   if (!n->IsString() || String::cast(n)->length() == 0) return inferred_name();